/* style.css placeholder *//* ================================
   Global Reset & Base
   ================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Noto Sans KR", sans-serif;
  background: radial-gradient(circle at top, #0f172a 0, #020617 55%, #020617 100%);
  color: #e5e7eb;
  line-height: 1.6;
}

/* 링크 기본 스타일 */
a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

/* 공통 컨테이너 */
.container {
  width: 100%;
  max-width: 1200px;
  padding: 0 20px;
  margin: 0 auto;
}

/* ================================
   Header / Navigation
   ================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.15);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 24px;
}

.logo img {
  height: 36px; /* 필요 시 조정 */
}

/* 네비게이션 */
.main-nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0;
  margin: 0;
}

.main-nav a {
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #e5e7eb;
  position: relative;
  padding-bottom: 4px;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #38bdf8, #22c55e);
  transition: width 0.2s ease;
}

.main-nav a:hover::after {
  width: 100%;
}

/* 언어 전환 */
.lang-switch {
  font-size: 13px;
  color: #9ca3af;
  white-space: nowrap;
}

.lang-switch a {
  padding: 2px 4px;
}

.lang-switch a.active {
  color: #f9fafb;
  font-weight: 600;
}

/* ================================
   Sections 공통
   ================================ */

.section {
  padding: 80px 0;
  position: relative;
}

.section:nth-child(odd) {
  background: rgba(15, 23, 42, 0.8);
}

.section:nth-child(even) {
  background: rgba(15, 23, 42, 0.95);
}

/* 섹션 헤더 */
.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-header h2 {
  font-size: 28px;
  margin: 0 0 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #f9fafb;
}

.section-subtitle {
  font-size: 15px;
  color: #9ca3af;
  margin: 0;
}

/* ================================
   Hero
   ================================ */

.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 10% 0%, rgba(56, 189, 248, 0.18) 0, transparent 55%),
    radial-gradient(circle at 90% 0%, rgba(34, 197, 94, 0.18) 0, transparent 55%),
    #020617;
  opacity: 0.9;
  z-index: -2;
}

/* 약간의 그리드/라인 느낌 */
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(
      rgba(148, 163, 184, 0.08) 1px,
      transparent 1px
    ),
    linear-gradient(
      90deg,
      rgba(148, 163, 184, 0.08) 1px,
      transparent 1px
    );
  background-size: 80px 80px;
  mix-blend-mode: soft-light;
  opacity: 0.6;
}

.hero-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
  padding-top: 40px;
  padding-bottom: 40px;
}

.hero-text {
  max-width: 560px;
}

.hero-text h1 {
  font-size: 40px;
  margin: 0 0 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-subtitle {
  font-size: 18px;
  color: #e5e7eb;
  margin: 0 0 16px;
}

.hero-desc {
  font-size: 15px;
  color: #cbd5f5;
  margin: 0 0 24px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
}

.hero-visual img {
  max-width: 420px;
  filter: drop-shadow(0 20px 40px rgba(15, 23, 42, 0.9));
}

/* ================================
   Buttons
   ================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease,
    transform 0.1s ease;
}

.btn.primary {
  background: linear-gradient(135deg, #38bdf8, #22c55e);
  color: #020617;
  border-color: transparent;
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 25px rgba(34, 197, 94, 0.4);
}

.btn.secondary {
  background: transparent;
  color: #e5e7eb;
  border-color: rgba(156, 163, 175, 0.7);
}

.btn.secondary:hover {
  background: rgba(15, 23, 42, 0.9);
}

.btn.tertiary {
  background: rgba(15, 23, 42, 0.9);
  color: #e5e7eb;
  border-color: rgba(148, 163, 184, 0.6);
}

.btn.tertiary:hover {
  background: rgba(30, 64, 175, 0.9);
}

/* ================================
   About
   ================================ */

.about-content {
  max-width: 840px;
  margin: 0 auto;
  text-align: center;
}

.about-content p {
  font-size: 15px;
  color: #e5e7eb;
}

.about-content p + p {
  margin-top: 10px;
}

.about-highlights {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  margin-top: 32px;
}

.about-item {
  background: rgba(15, 23, 42, 0.9);
  border-radius: 16px;
  padding: 20px;
  width: 100%;
  max-width: 260px;
  border: 1px solid rgba(148, 163, 184, 0.3);
}

.about-item img {
  width: 40px;
  margin-bottom: 10px;
}

.about-item h3 {
  font-size: 16px;
  margin: 0 0 6px;
}

.about-item p {
  font-size: 14px;
  color: #9ca3af;
}

/* ================================
   Platform
   ================================ */

.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.platform-item {
  background: rgba(15, 23, 42, 0.9);
  border-radius: 16px;
  padding: 18px;
  border: 1px solid rgba(148, 163, 184, 0.35);
}

.platform-item img {
  width: 36px;
  margin-bottom: 10px;
}

.platform-item h3 {
  font-size: 15px;
  margin: 0 0 6px;
}

.platform-item p {
  font-size: 14px;
  color: #9ca3af;
}

.platform-diagram {
  margin-top: 24px;
  text-align: center;
}

.platform-diagram img {
  max-width: 520px;
  margin: 0 auto;
}

/* ================================
   Ecosystem
   ================================ */

.ecosystem-layout {
  display: flex;
  align-items: center;
  gap: 40px;
}

.ecosystem-text {
  flex: 1;
}

.ecosystem-text p {
  font-size: 15px;
}

.ecosystem-list {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
}

.ecosystem-list li {
  font-size: 14px;
  color: #cbd5f5;
  margin-bottom: 8px;
}

.ecosystem-visual {
  flex: 1;
  display: flex;
  justify-content: center;
}

.ecosystem-visual img {
  max-width: 420px;
}

/* ================================
   Token
   ================================ */

.token-content {
  display: flex;
  align-items: center;
  gap: 40px;
}

.token-text {
  flex: 1;
}

.token-text p {
  font-size: 15px;
}

.token-text h3 {
  font-size: 16px;
  margin-top: 16px;
}

.token-uses {
  list-style: disc;
  padding-left: 20px;
  margin-top: 8px;
}

.token-uses li {
  font-size: 14px;
  color: #d1d5db;
  margin-bottom: 4px;
}

.token-visual {
  flex: 1;
  display: flex;
  justify-content: center;
}

.token-visual img {
  max-width: 420px;
}

/* ================================
   Services
   ================================ */

.service-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.service-card {
  background: rgba(15, 23, 42, 0.95);
  border-radius: 18px;
  padding: 18px 18px 20px;
  border: 1px solid rgba(148, 163, 184, 0.35);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.service-card img {
  border-radius: 12px;
}

.service-card h3 {
  font-size: 16px;
  margin: 0;
}

.service-card p {
  font-size: 14px;
  color: #9ca3af;
  flex: 1;
}

.service-card .btn {
  align-self: flex-start;
  margin-top: 4px;
}

.service-note {
  margin-top: 24px;
  font-size: 14px;
  text-align: center;
  color: #9ca3af;
}

/* ================================
   Roadmap
   ================================ */

.roadmap-timeline {
  max-width: 800px;
  margin: 0 auto;
  border-left: 2px solid rgba(148, 163, 184, 0.4);
  padding-left: 24px;
}

.roadmap-item {
  position: relative;
  padding: 10px 0 24px;
}

.roadmap-item::before {
  content: "";
  position: absolute;
  left: -11px;
  top: 14px;
  width: 14px;
  height: 14px;
  border-radius: 999px;
  background: linear-gradient(135deg, #38bdf8, #22c55e);
  box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.15);
}

.roadmap-year {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: #a5b4fc;
  margin-bottom: 4px;
}

.roadmap-item h3 {
  font-size: 15px;
  margin: 0 0 4px;
}

.roadmap-item p {
  font-size: 14px;
  color: #9ca3af;
  margin: 0;
}

/* ================================
   Contact
   ================================ */

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.4fr);
  gap: 32px;
  align-items: flex-start;
}

.contact-info h3,
.contact-form h3 {
  font-size: 16px;
  margin: 0 0 10px;
}

.contact-info p {
  font-size: 14px;
  color: #d1d5db;
  margin: 4px 0;
}

.contact-form form {
  background: rgba(15, 23, 42, 0.95);
  border-radius: 18px;
  padding: 20px;
  border: 1px solid rgba(148, 163, 184, 0.35);
}

.form-row {
  display: flex;
  flex-direction: column;
  margin-bottom: 14px;
}

.form-row label {
  font-size: 13px;
  color: #e5e7eb;
  margin-bottom: 4px;
}

.form-row input,
.form-row textarea {
  background: #020617;
  border: 1px solid rgba(148, 163, 184, 0.5);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 14px;
  color: #e5e7eb;
  outline: none;
}

.form-row input:focus,
.form-row textarea:focus {
  border-color: #38bdf8;
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.4);
}

.form-row textarea {
  resize: vertical;
}

/* ================================
   Footer
   ================================ */

.site-footer {
  background: #020617;
  border-top: 1px solid rgba(30, 64, 175, 0.7);
}

.footer-inner {
  padding: 18px 0;
  text-align: center;
  font-size: 13px;
  color: #6b7280;
}

/* ================================
   Responsive
   ================================ */

@media (max-width: 1024px) {
  .platform-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .service-grid {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    flex-direction: column;
    text-align: center;
  }

  .hero-text {
    max-width: 100%;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-visual img {
    max-width: 360px;
  }

  .ecosystem-layout,
  .token-content {
    flex-direction: column;
  }

  .ecosystem-visual img,
  .token-visual img {
    max-width: 360px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 10px;
  }

  .main-nav ul {
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
    font-size: 13px;
  }

  .section {
    padding: 60px 0;
  }

  .section-header h2 {
    font-size: 24px;
  }

  .hero {
    min-height: auto;
  }

  .roadmap-timeline {
    border-left-width: 1px;
    padding-left: 18px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .platform-grid {
    grid-template-columns: 1fr;
  }

  .about-highlights {
    gap: 16px;
  }
}